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Updated: Jun 23, 2026
Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
Published on: January 30, 2020
Determination of marine gamma activity and study of the minimum detectable activity (MDA) in 4pi geometry based on
C Bagatelas1, C Tsabaris, M Kokkoris
1Institute of Oceanography, Hellenic Centre for Marine Research, Anavyssos, Greece.
Abstract:
Monte Carlo simulations were performed using the GEANT4 code for the investigation of gamma-ray absorption in water in different spherical geometries and of the efficiency of a NaI(Tl) detector for different radionuclides in the aquatic environment. In order to test the reliability of these simulations, experimental values of the NaI(Tl) detector efficiency were deduced and seem to be in good agreement with the simulated ones. In addition, using the simulated efficiency, an algorithm was developed to determine the minimum detectable activity in becquerels per cubic meter in situ as a function of energy for typical freshwater and seawater spectra.
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